Ratchet-wrench.



R. F. CHAPMAN.

RATGHBT WRENGH. APPLIGATIONTILED AUG. 7, 190s.

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Patentsd Sept. 21, 1909.

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H L M it RAY F. CHAPI'IAN, OF CONTENT, ALBERTA, CANADA.

RATCHET-WRENCH.

Application led August 77 Specification of Letters Patent.

Patented Sept. 21, 1909.

1.908. Serial No. 447,493.

To all whom it may concern:

Be it known that l, RAY F. CHAPMAN, a citizen of the United States,residing at Content, in the Province of Alberta, in Canada, haveinvented certain new and useful lmprovements in Ratchet-Vrenches, ofwhich the following is a specification.

This invention relates to ratchet wrenches, and one of the principalobjects thereof is to provide a simple and etlicient means for turningnuts of different sizes without adjustment of the wrench.

Another object of the invention is to provide means whereby nuts ofvarying sizes may be manipulated upon bolts, and to provide meanswhereby the bolts may extend through the wrench without interfering withthe turning of the nut.

another object sought by my invention is the provision of a reversibleratchet wrench in which means are provided for engagement with nuts ofdifferent sizes without adjustment of the nut holding means, and toprovide means for throwing into and out of operation the pawls forengaging the ratchet part of the wrench.

Still another object contemplated by my invention is to furnish meanswhereby an auxiliary handle may be connected to the wrench proper tofacilitate screw thread tapping' and other similar operations.

To the accomplishment of the recited objects, and others coordinatetherewith, the preferred embodiment of my invention resides in thatconstruction and arrangement of parts hereinafter described, illustratedin the accompanying drawings, and embraced within the scope of theappended claims.

l'n said drawings Figure I is an elevation of the wrench, the lowerenlarged head portion being shown in section. Fig. Il is an elevation ofone terminal of the wrench in cross section, showing the manner ofattaching the auxiliary handle thereto. Fig. HI is a detail perspectiveview of the adjusting ring, and F IV is an elevation of the nut holder.

Similar reference characters indicate corresponding parts throughout theseveral views.

Referring to the accompanying drawings for a more particular descriptionof my invention, the numeral 1 designates the handle which is terminallyenlarged to form heads at 2 and 3, the latter portion being slightlymore reduced in size than the former portion. Otherwise, the terminalsand appurtenances are substantially identical in arrangement andconstruction, and it is, therefore, only deemed necessary to describeone of these terminals. The lower head is Substantially circular shapedand is provided with a bore which is adapted to receive a rotatable nutholder is exhibited in Fig. 1V of the drawings, the nut holder (4) isprovided medially thereof on its periphery with ratchet teeth and on oneside with an annular flange which is adapted to engage the outer portionof the head (2), the other side of the nut holder' having acircumferentially extending groove or depression (7) which is designedto be engaged by the pins (8) on opposite sides of the head portion.Furthermore, it will be noted, as indicated by dotted lines in Fig. TV,that the nut receiving depressions and (10) are of different-sizes, thesame principle being maintained in the other head of the wrench.Adjacent the bottom of the head (2) and on opposite sides thereof, arepivotedly mounted pawls (11), as at 12, the same being actuated by thespring detents which are likewise seated at the base portion of the headrl"he upper distal ends ofthe pawls (11) are arranged coincident withthe ratchet teeth (5), and the lower distal ends thereof are adapted tobe engaged by the ring escapement device (14) being cut out ormutilated, as at 15 and 16. Exterior-ly of the enlarged head (2), atdiametrically opposite points, are arranged depressions (17) which areadapted to receive the engaging ends of the screws (18) of thebifurcated termina-ls (19) of the auxiliary handle portion (20). in thisconnection it will be observed that the pins (8) extend beyond theperiphery of the head (2) and engage apertures at approximately thecentral portions of the arms (19), thus serving a dual capacity insecuring the rotatable nut holder and preventing vertical oscillationsof the auxiliary handle with respect to the head.

lWhen it is desired to adjust a nut upon a bolt or remove the nuttherefrom, the wrench head is placed over the nut to be engaged by thecorresponding depression (10) or (9) of the nut receiving member (4L),one of the pawls (11) being disconnected from the ratchet teeth (5) byrotating the escapement ring (14) until the inner side thereof engagesthe upper distal end of said pawl, and simultaneously and in propersequence the upper terminal portion of the other pawl will bedisengaged, due to the registration of one of the cut out port-ions (l5)or (16) of the escapement ring and the action of the spring detent (13).Nhen the wrench is to be reversed the opposite pawl is released and theother pawl is engaged. It frequently happens that a change in the sizeof the nutreceiving depressions is required, and to provide for thiscontingency I have mounted the said nut holder in detachable relationwith the head portion 2), the latter portions being held together by thepins (8) which can obviously be removed at will. Another salient featureof my invention is the employment of the auxiliary handie (20)conjunctively with the head portion (2). rlhe smaller head portion onthe opposite terminal of the handle (l) serves to accommodate anutholder with nut receiving depressions that are smaller than thedepressions in the nut holder mounted on the opposite end of the handleand, while ordinarily the two head portions with the nut receivingmembers may be applied to any work, as hereinbefore stated, if it isfound that other sizes of nut holding members are required the same canbe removed, and others substituted therefor in an instants notice.

lt should'be understood that in` its broader aspects my inventioncomprehends the employment not only of the various means described, butof equivalent means for performing the recited functions.

Vhile the arrangement shown is thought, at the present time, to bepreferable, it is desired to reserve the right to effect suchmodications and variations thereof as may come fairly within the scopeof the appended claims.

That I claim as new is l. A ratchet wrench comprising a handle, a head,a rotatable nut holding member having ratchet teeth, an auxiliary handleadapted to be mounted on said head, means carried by the latter fordetachably securing said nut holding member and preventing oscillationsof the said auxiliary handle with respect to the head, pawls carried bythe wrench head, and means associated therewith for throwing said pawlsinto and out of engagement with the ratchet teeth.

2. A ratchet wrench comprising a handle, a head, a rotatable nut holdingmember having ratchet teeth, an auxiliary handle adapted to be mountedon said head, pins carried by the latter for detachably securing saidnut holding member and preventing oscillations of the said auxiliaryhandle with respect to the head, pawls carried by the Wrench head, andmeans associated therewith for throwing said pawls into and out ofengagement with the ratchetteeth.

3. A ratchet wrench comprising a handle, a head, a rotatable nut holdingmember having a groove and ratchet teeth, an auxiliary handle adapted tobe mounted on said head and having apertures therein, pins carried bythe head for removably engaging the groove and the apertures, pawlscarried by the wrench head, and means associated therewith for throwingsaid pawls into and out of engagement with the ratchet teeth.

4t. A ratchet wrench comprising a handle, a head, a rotatable nutholding member having a circumferentially extending groove and ratchetteeth, said head having apertures extending therethrough atdiametrically opposite points, said apertures being tangent and injuxtaposition to said groove, pins adapted to be detachably insertedthrough said apertures and groove and having their outer distal endsprotruding beyond the periphery of said head, an auxiliary handleadapted to be secured to said head and having cooperation with thedistal ends of said pins, pawls carried by the wrench head, and meansassociated therewith for throwing said pawls into or out of engagementwith the ratchet teeth.

5. A ratchet wrench comprising a handle, a head, a rotatable nut holdingmember having a circumferentially extending groove and ratchet teeth,said head having apertures extending therethrough at diametricallyopposite points, said apertures being tangent and in juxtaposition tosaid groove, pins adapted to be detachably inserted through saidapertures and groove and having their outer distal ends protrudingbeyond the periphery of said head, an auxiliary handle having abifurcated extremity secured to opposite sides of said wrench head andhaving apertures for the reception of the distal ends of said pins,pawls carried by the wrench head, and means associated therewithforthrowing said pawls into or out of engagement with the ratchet teeth.

In testimony whereof l my signature, in presence of two witnesses.

RAY F. CHAPMAN. Vitnesses CHARLES A. DAvrEs, T. Q.. MOORE.

